The OSI boar list is updated once a month using the most current Estimated Breeding Values (EBV’s) from the Canadian Center for Swine Improvement (CCSI). This allows all users to keep on the cutting edge of the current genetic worth of all the purebred boars. Note there are Yorkshire, Landrace, Duroc purebred boars. As well we list the crossbred categories of semen that is available.